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Assume a consumption function that takes on the following algebraic form: C = $100 + .8Y. Assume that Y = $1000 what is the level of consumption at this income level. C = $100 + .8($1000) = $100 + $800 = $900. 1. Using the above figure calculate the marginal propensity to consume between the aggregate income levels of $80 and $100. Also explain why this consumption function is linear. The marginal propensity to consume is equal to $15/$20 = .75. The consumption function is linear because the marginal propensity to consume is constant and therefore the slope is the same throughout all income levels. 2. Assume consumption is represented by the following: C = 400 + .75Y. Also assume that planned…show more content…
Therefore, if people have more money then they are likely to purchase more goods - potentially ones from our country, thus exports will rise and the value of net exports will increase. If disposable income abroad is low then exports will fall and the value of net exports will fall. • Disposable income at home. This refers to how much money people at home have available to spend on luxuries. The more money people have at home, the likelier they are to spend - which can result in a rise in imports. Rising imports will have a negative effect on net exports on the overall aggregate demand. Vice versa. • Exchange rates. These play a large part in the value of net exports. A fall in a countries exchange rate will reduce the price of exports and raise the price of imports, thus exports should rise and imports fall - resulting in an increase in net exports. A rise in a countries exchange rate will raise the price of exports and make imports cheaper, therefore making exports fall and imports rise. The overall effect will be a fall in net exports. 8. Explain the accelerator theory. The accelerator effect is when an increase in national income results in a proportionately larger rise in investment Consider an industry where demand is rising at a strong pace. states that if there is a small change in the production output of consumer change, there will be a much greater change in the production

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